Treadle mechanism



(N0 ModeL) 2 Sheets-Sheet 1. E. S. MANN.

TREADLE MECHANISM.

No. 255,732. Patented Mar. Z8.1882.

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(N0 ModeL) 2 Sheets-She et 2.

E. S. MANN.

- TREADLB MEGHANISM.

No. 255,732., Patented Mar. 28,1882,

w I I d v 9 w 8 M w u wd I/QZWA W Witnesses:

UNITED STATES PATENT OFFICE. q

ERNEST S. MANN, OF BROGKTON, MASSACHUSETTS.

TREADLSE MECHANISM.

SPECIFICATION forming part of Letters Patent No. 255,732, dated March28, 1882,

Application filed November 7,1881. (No model.)

To all whom it may concern:

Be it known that I, ERNEST S. MANN, of Brockton, in the county ofPlymouth and State ofMassaehusetts, haveinvented new and usefulImprovements in Treadle Mechanisms tion, with two alternately-operatingtreadles,

of a driving-pulley mounted loosely upon a journal about which it .maybe revolved, two disks or wheels, also mounted'loosely upon the sameshaft stud orjournal, one upon each side of the arms or web of saidpulley, and so as to revolve or oscillate within the inner periphery ofthe rim of said pulley, and each provided in its outer periphery witharecess orpocket, the bottom of which is inclined to the periphery ofsaid disk or eccentric to its axis, a ball placed in each of saidpockets between the inner periphery of the driving-belt pulley and thebottoms of said pockets, a crank-pin set in each of said disks, and aconnecting-rod connecting each of said crank-pins with one of thetreadles, as will be described.

Figure 1 of the drawings is a side elevation of my improved treadlemechanism. Fig. 2 is a vertical section on line so :10 on Fig. 1, andFig. 3 is a vertical section through one of the crank-carrying disks online 3 3 on Fig. 2.

A and A represent portions of the frame of a sewing or other machine.

B is the treadle-shat't, having mounted thereon the two treadles O and Cin such a manner that they may be vibrated about said shaftindependently of each other, said treadles being provided with theoffsets G and O to permit the connecting-rods to be attached thereto atone side of the operators knees.

D is a stud set in the frame A in a fixed position, and having mountedloosely thereon the pulley E, provided with the peripheral groove to toreceive a belt (not shown) by which the motion of said pulley may betransmitted to the cam-shaft of a sewing-machine or to any other shaftor pulley. The pulley E has formed in opposite sides thereof the annularrecesses b and b, in which are placed the disks or wheels F and F,respectively, which are fitted loosely upon the opposite hubs of thepulley E, or they may have their bearings upon the stud D upon each sideof said pulley. The disks F and F have set in their outer radial facesthe crank-pins c and a, respectively, by which and the rods d and d thedisks F and F are respectively connected to the treadles O and C, andeach of said disks has formed in its peripheral edge the recess orpocket 6, the bottom of which is inclined to the periphery of said disk,and is provided at one end with the abutment e, as shown in Fig. 3.

In the pocket e, and between its inclined surface and the innerperiphery of the rim of the pulley E, is placed a ball, f, which, whenthe treadles are in the position indicated by O in Fig. 1, will rest onthe rim of the pulley E without touching the inclined surface of thepocket 0. If, now, theinner or toe end of the treadle G be depressed soas to move the disk F about its axis in the direction indicated by thearrow, the inclined surface of the pocket 0 engages with the upper sideof the belly, causing it to be wedged between saidinelined surface andthe inner periphery of the rim of the pulley, thereby compelling saidpulley to move about its axis with the disk F. If at the same timetheheel end ol'thetreadle G be depressed, the disk F will be moved aboutits axis in a direction opposite to that indicated by the arrow withoutaffecting the movement of the pulley E as the inclined surface of thepocket c is moved away from the ball f, thus relieving the gripe uponthe pulley E. If, now, the motion of the treadles O and C be reversed,the gripe between the disk F and pulley E will be released, and thepullcyE will be made to continue its revolution in the directionindicated by the arrow by the disk F pressing the ball f between itsinclined surface and the rim of said pulley, as before described inregard to the disk F, and thus by the alternate action of the twotreadles O and C a continuous revolution of the pulley E in onedirection is obtained without danger or possibility of turning thepulley in the wrong direction.

I am aware that is not new to rotate a shaft by means of an intermittentand alternately acting double frictional device, as described in LettersPatent No.103,847, granted to Edwin Uowles, June 7, 1870, and reissuedJuly 6, 1873; but my invention is an improvement upon the devices shownand described in said patent, in that the number of parts are reduced,and the apparatus is simplit'cd and rento carry and impart motion to abolt, the two disks F and F, each provided with a pocket, 6, a ball ineach of said pockets, and mechanism for imparting to each of said disksalternatelyanintermittentoscillating motion about its axis,substantially as described.

2. In com bination with two treadles, the pul- 25 ley E, provided withrecesses upon its opposite sides and adapted to carry a driving-beltupon its periphery, mounted loosely upon a fixed bearing, the two disksF and F, each provided with a crank-pin and having formed in 0 itsperiphery a recess or pocket, 0, the two ballsf, and twoconnecting-rods, all arranged and adapted to operate substantially asand for the purposes described.

3. The combination of the treadles O and 5 0, provided with the offsetsand 0 respectively, the connecting-rods d and d,disks F and F, eachprovided with a crank-pin and a pocket, 0, the two ballsff, and thepulleyE,

all constructed, arranged, and adapted to op- 0 erate substantially asand for thepurpose described.

Executed at Boston, Massachusetts, this 3d day of November, A. D. 1881.

, ERNEST S. MANN. Witnesses:

E. A. HEMMENWAY, WALTER E. LOMBARD.

